Hi,
Thanks for quick response!
But i am facing problem in using memtest. After writing the file in CD. when i restarts my pc and use boot from CD then nothing happens i have to just choose profile 1 option to run the windows normally.

Is there any other alternative way to test memory. But I have already checked using new memory but still the blue dump error appears.

The computer has rebooted from a bugcheck. The bugcheck was: 0x0000000a (0x01fb4cf4, 0x0000001c, 0x00000001, 0x804e1466). A dump was saved in: C:\WINDOWS\MEMORY.DMP.

TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts.

The computer has rebooted from a bugcheck. The bugcheck was: 0x0000000a (0x01fb412c, 0x0000001c, 0x00000001, 0x804e1466). A dump was saved in: C:\WINDOWS\MEMORY.DMP.
The computer has rebooted from a bugcheck. The bugcheck was: 0x0000000a (0x01dfd3fc, 0x0000001c, 0x00000001, 0x804e1466). A dump was saved in: C:\WINDOWS\MEMORY.DMP.
The computer has rebooted from a bugcheck. The bugcheck was: 0x0000000a (0x01bf8eb4, 0x0000001c, 0x00000001, 0x804e1466). A dump was saved in: C:\WINDOWS\MEMORY.DMP.

The computer has rebooted from a bugcheck. The bugcheck was: 0x0000000a (0x01effd3c, 0x0000001c, 0x00000001, 0x804e1466). A dump was saved in: C:\WINDOWS\MEMORY.DMP.
The system detected that network adapter \DEVICE\TCPIP_{85A66713-7D84-4D6D-B545-62ACF1778CA5} was disconnected from the network, and the adapter's network configuration has been released. If the network adapter was not disconnected, this may indicate that it has malfunctioned. Please contact your vendor for updated drivers.

The time provider NtpClient is configured to acquire time from one or more time sources, however none of the sources are currently accessible. No attempt to contact a source will be made for 14 minutes. NtpClient has no source of accurate time.

The IP address lease 0.0.0.0 for the Network Card with network address 001558D120DA has been denied by the DHCP server 0.0.0.0 (The DHCP Server sent a DHCPNACK message).

Thanks for your quick response
Yes, earlier i was having service pack 2 then i thought after installing service pack 3 problem will be resolved but it has not...
I have enough space in C and F drive
F: 21.4 GB
C : 34.1 GB
D :6.93 GB
E: 5.55 GB

So you mean to say if i put 1 GB ram my problem will be resolved surely..
Please advise...

4 partitions on a single 160GB drive is not good. Drive C should be a single full 160GB. If you want more storage space, use a second larger hard drive and partition it. Yes going to 1GB system memory will speed things up a bit

So were you trying to update the bios and the update failed? You may be able to pull out the CMOS battery, and reset the bios. Other than doing that, the motherboard may have to be replaced to save this laptop